I've been getting reports that the Pack Installer is breaking on startup. I believe I have figured out what the problem is. It turns out that when I released the Beta version to the web, I updated a forwarding link to point to an updated version of the feed file for the Beta. This new feed file is not backwards compatible with the Alpha release. Please confirm if you are getting the runtime error described either in the comment on this page, or in the Issue Tracker, that you are using the Alpha release (PackInstaller.exe, shipped in a Zip file). If you are, please upgrade to the Beta release (PackInstallerBeta.exe, no Zip). If this does not fix the problem you can let me know directly at jeremyke A T _ microsoft.com Sorry for any inconvenience this may have caused. On the plus side I'm glad to see you all using the tool!